Valve-operating mechanism.



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VALVE-OPERATING MECHANISIVI.

Application filed January 30, 1912.

To @ZZ 'whom it may concern Be it known that I, EDMUND HAWTHORNEMronLnwooD, a subject of the King of Great Britain, residing in Devon,England, and whose post-office address is 5 St. Michaels Terrace,Plymouth, in the county of Devon, England, consulting engineer, haveinvented certain new and useful Improvements in Valve-OperatingMechanism, of which the following is a speciication.

This invention relates to mechanism for operating a rotary valvecontrolling the admission and discharge of the working fluid of enginesand particularly of an internal combustion engine, which mechanism isadapted to turn the valve rapidly with intermediate periods during whichthe valve is at rest or comparatively at rest and which enables acomplete cycle of opening and closing of the valve to be divided intounequal periods of action.

The invention is illustrated in the accompanying drawing, wherein-Figure l represents a section through a rotary valve assembled in aseating associated with the working cylinder of an engine, the improvedvalve-operating mechanism being shown applied to the rotary valve, andFig. 2 is a face view of the improved valve-operating mechanism asviewed from the left in Fig. l.

The improved valve operating mechanism comprises a stationarycylindrical boss a on which is mounted a disk or wheel y which can beturned by any suitable means.

From the face of wheel f extends'a pin Z which engages in a longitudinalslot Z9 in a bar or block 5 which is rigidly secured to the spindle s ofthe rotary valve Z. VThe valve Z is mounted in its seating e fixed tothe wall c of the working cylinder of the engine and is showncontrolling the intake and exhaust ports or passages i0, 7?',respectively, the valve having a port 292 therein which alternatelyestablishes communication between the ports 79 and p and the explosionchamber O above the engine piston P. The spindle s is journaled in theboss a in eccentric relation therewith.

Specification of Letters Patent.

Patented Dec. 26, 1916.

Serial No. 674,304.

Owing to the relative position of the axis of the wheel f and the valvespindle s not being co-axial, the bar Z), when wheel f is rotated atuniform speed, is driven by pin (Z and has imparted to it a variablerotary speed which is transmitted to the valve spindle s and valve Z.The latter can thus be arranged to make a longer dwell over one part ofa complete turn than over the other portion thereof, for the extent ofvariation of the movement of the valve is governed by the eccentricityof its axis with respect to the axis of thewheel 7.

Having thus described my invention and the best means I know of carryingthe same into practical effect, I claim 1. The combination of a rotaryport-controlling valve, and means adapted to impart a variable rotaryspeed to the valve, said means consisting of a stationary cylindricalboss carried by the engine, a spindle operatively connected with thevalve and journaled in the boss in eccentric relation with the axisthereof, a revoluble member mounted co-axially on the boss, a rotarymember secured to the spindle, a driving connection between the said twomembers, and means for driving the first said member.

2. The combination of a rotary port-controlling valve, and means adaptedt0 impart a variable rotary speed to the valve, said means consisting ofa stationary cylindrical boss carried by the engine, a spindleoperatively connected with the valve and journaled in the boss ineccentric relation with the axis thereof, a revoluble member mountedco-axially on the boss, a rotary member Y secured to the spindle, adriving connection between the said two members, comprising a pin on therevoluble member slidably engaging a slot in said rotary member, andmeans for driving the irst said member.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDMUND HAWTHORNE MICKLEWOOD. vWitnesses:

S. CARLILE DAVIS, GEORGE ANDREWS.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, I). G.

